Eighth. I claim the combination of apparatus for tempering the moulding sand, apparatus for distributing the tempered sand and sifting it into the sand reservoir, and apparatus for supplying to the flask a measured quantity of sand from the reservoir, with a flask and pressing apparatus, whereby the sand is worked and the mould produced by ma chinery, operating substantially as herein set forth.

CHAPMAN WARNER.

No. 8571.-Improvement in Running Gear of Locomotives.

What I claim as my invention, and desire to secure by letters patent, is the use of steam springs for the support of the weight carried by the driving wheels of a locomotive engine, in combination with bearing or supporting wheels placed both before and behind the aforesaid driving wheels, which bearing wheels support a portion of the weight of the engine, through the medium of steel, air, India-rubber, or other springs possessing the properties herein described, as belonging to steel springs, as distinguished from steam springs, for the purpose set forth in the specification.

I also claim the employment of steam springs, or steam pressure, operating separately from the propelling cylinders, for the purpose of varying the pressure of the driving wheels of a locomotive engine upon the rails of the road, in combination with bearing or supporting wheels placed both before and behind the aforesaid driving wheels, which bearing wheels support a portion of the weight of the engine, through the medium of steel, air, India-rubber, or other springs possessing the properties herein described, belonging to steel springs, as distinguished from steam springs, for the purpose set forth in the specification.

ROSS WINANS. No. 8572.-Improvement in Apparatus for opening and closing Gates.

Having thus described my improved gate, what I claim therein as my invention, and desire to secure by letters patent, is making a blank space on the lever, o, and vibrating it so far as to disengage the cogs upon it from the cogs upon the plate, 7, so that the gate may be opened and closed by persons on foot without the aid and without operating the lever, o, in combination with the connecting of the bar, r, (or latch) to the lever, o, by the rope, g, so as to unlatch the gate when the lever, o, vibrates before the cogs on the lever, o, gear into the cogs upon the plate, 7, to open the gate, substantially as described.

ENOCH WOOLMAN.

No. 8573.-Improved Revolving Reverberatory Furnance.

What I claim as my invention, and desire to secure by letters patent, is the rolling or revolving furnace, revolving on friction wheels, or rollers, or their equivalent, in combination with an ordinary fire, such as is used in reverberatory furnaces, the two being combined in such a manner that the products of combustion, heated gases, &c., from the grate shall pass into the interior of said rolling or revolving furnace, sub

stantially as herein described, said rolling or revolving furnace being applicable to any purpose for which ordinary reverberatory or wind furnaces are employed. AMBROSE S. BEADLESTON.

No. S574.-Improvement in Potato Diggers.

What I claim as of my own invention, and desire to secure by letters patent of the United States, is the arrangement and combination of the cutting and digging cylinders with the riddles, in the manner herein set forth.

DANIEL D. BELL.

No. 8575.—Improvement in construction of Sounding Boards for Musical Instruments.

What I claim as my invention, and desire to secure by letters patent, is the above-described mode of constructing the sounding-boards of stringed instruments by combining or arranging together any suitable number of pieces of wood prepared as above, all in manner and for the purpose as herein set forth.

CORNELIUS BOGART.

No. 8576-Improvement in Running Gear of Railroad Cars. What I claim as new and original, and desire to secure by letters patent, is adapting to each side of railroad car trucks four or more wheels, attached to a frame-work, inflexible vertically, but with a horizontal motion, in such manner that in case of depressions in the rails at their joinings, or otherwise, they (the wheels) will alternately, by couplets, triplets, or the like, receive the weight of the load above, and relieve the wheel passing over the depression from the weight of the load and frame-work, so that no concussive blow is struck with that weight, or jar created, substantially as above described.

THOMAS A. DAVIES.

No. 8577.-Improved Carbonic Acid Gas Engine.

I do not claim the invention of carbonic acid gas in its liquified or æriform character as a motive power; neither do I claim the use of the hydrostatic press for liquifying the gas, as these principles have long been known and commented upon by Sir Hy. Davy, Faraday, Brunnel, and others. But what I claim as my invention, and desire to secure by letters patent, is—

First. A carbonic acid gas engine, in which said fluid passes from a reservoir, where it exists in a liquid state, through suitable valves, into a heated cylinder, thence into a refrigerator, where it is cooled, and thence through pumps, where it is condensed by hydrostatic pressure, and forced back again to the reservoir before named; the said engine being constructed substantially as herein described.

Second. The combination of crimped leather washers, a spiral spring, or springs, and oil, or any lubricant, for packing the piston-rods, or plungers, as described.

JOHN C. FR. SALOMON.

No. 8578.-Improvement in Gas Regulators.

What I claim as my invention, and desire to secure by letters patent, is the closing of the valve, d, when the fluid becomes too low in the gas regulator for safety, by the movement of the float, j, and the lever, i, h, and their action upon the thimble, l, on the valve rod, c, substantially as

herein set forth.

JONATHAN S. CONANT.

No. 8579.-Improvements in Water Metres.

What I claim as my invention, and desire to secure by letters patent, is

First. The uniform circular channel, a, a, in combination with the contracted channel, b.

Second. I claim the rotating paddle-wheel, having paddles projecting into and working in the said uniform and contracted channels.

Third. I claim the apertures, m and n, proportioned and formed as described.

Fourth. I claim the pipe, q, with its jet, r, for giving motion to the paddle-wheel before the fluid enters through the aperture, m.

Fifth. I claim the valve, k, by which any desirable power of jet may be obtained before any fluid enters through m.

J. ERICSSON.

No. 8580.-Improvement in Chucks for Lathes.

Having thus described my improved chuck, what I claim therein as new, and desire to secure by letters patent, is the mechanism, herein described, or the equivalent thereof, for connecting and disconnecting at will the whole or any part of the screws which operate the griping jaws, with the wheel which turns them, so that the screws and jaws may be moved either separately or in connexion, or in part separate and in part connected, whereby objects of either regular or irregular shape may be chucked, either eccentrically or concentrically with the axis of the mandrel, substantially as herein described.

I also claim the turning plate (I) of the chuck, constructed with a cogwheel on its inner face, made in segments, part of which can be witn drawn out of gear with the pinions on the carrier screws, or held in gear therewith by means of set screws and springs, or the equivalent thereof, substantially as herein set forth.

JOSEPH HYDE.

No. 8581.-Improvement in Feeding Logs in Saw Mills.

Having thus fully described the nature of my invention, what I claim therein as new, and desire to secure by letters patent, is the combination of any number of adjustable rollers, F, which may be set at any angle with the feed rollers, Q, or with each other, for the purpose of feeding up the log, so that it may be cut with the curve or grain of the wood, substantially in the manner herein set forth and described. CHARLES KETCHAM.

No. 8582.-Improved arrangement of Pans for washing Ores, Minerals,

I do not claim the device of arranging a movable pan in a vibrating frame, and of operating the same, so as to give a double motion to the pan, since letters patent for this invention have been granted to Arnold Buffum and Philip Thorp.

What I claim as my invention, and desire to secure by letters patent, is the arranging and operating of a series of ore-washing pans, or sets of pans, in a vibrating frame, said pans, or sets of pans, having also an oscillating or rocking motion in the frame, in such a manner that, as the superficial portion of the contents passes freely from any one pan or set of the series into the next, the contents shall at the same time pass out of the latter less freely, or not at all, and vice versa, substantially as already described.

Second. I claim also the arranging in a vibrating frame of a series of pans, or sets of pans, one after the other, each pan, or set, being hung upon the frame by a separate axle, or equivalent attachment, and secured in its working position by a catch, or other equivalent means, in such a manner that each pap, or set, may be conveniently disconnected and tilted, so as to discharge its whole contents into a receptacle separate from those of the other pans.

Third. I claim also the arranging of a succession of groups of pans by a constant duplication for the subdivision of the contents in such a manner that the contents issuing from each pan of any one group, the last excepted, shall pass, by an equal division, into two pans of the next succeeding group, substantially as described.

SAMUEL PORTER.

No. 8583.-Improvement in Car Seats.

Having thus described the nature of our invention, what we claim as new, and desire to secure by letters patent, is the arrangement of the reversing arms, A, A, pivoted midway the height of and to the back, so as that they shall descend and slide through the pivot rollers, so as that any required height of back may be reversed from one side of the seat to the other, in the manner and for the purpose substantially the same as described.

EZRA RIPLEY,
E. L. BRUNDAGE.

No. 8584.-Improvements in Lath Machines.

Having thus fully described the nature of my invention, what I claim therein as new, and desire to secure by letters patent, is so arranging the frame that carries the reciprocating or chopping knives and feeding ap paratus as that, whilst cutting, it shall at all times rest by its own weight on the bolt or log, in advance of the portion thereof which is being cut, in combination with the mode, as herein described, of giving to the knives carried in said frame an alternating drawing movement towards and from the log, independent of the downward motion or position of the frame, by which means the block may be entirely reduced to laths,

while the whole weight of the knife frame is resting on it to keep it firm and solid.

I also claim, in combination with. the cutter stock, the feeding plates for feeding up the log to the cutters, a "throw" being given to said stock for that purpose; and this I claim, whether the same is accomplished by the means herein specially set forth, or by any other means essentially the same. G. W. TOLHURST.

No. 8585.-Improvement in Chair Seats.

What I claim as my invention, and desire to secure by letters patent, is the above combination of the frame and web, being the mode of securing the web to the frame, as herein set forth, by gluing or cementing the web into a groove in the frame.

JOHN W. DRUMMOND.

No. 8586.-Improvement in Weavers' Temples.

What we claim as our invention, and desire to secure by letters patent, is the roller temple, constructed as herein set forth; the roller working in a concave, so that the cloth is held at that line of the periphery of the roller which is nearest the reed, at which line the roller is enabled to perform its duty with the greatest efficiency.

ELIHU DUTCHER,
WARREN W. DUTCHER.

No. 8587.-Improvement in combining Organs and Piano Fortes.

I do not claim combining the organ and piano forte, irrespective of the manner in which the combination is formed; but what I claim as my invention, and desire to secure by letters patent, is

First. The whole or any number of the tubes of an organ, with a distinct set of keys, in combination with a piano forte having its own proper set of keys, in such a manner that either the piano forte or organ can be played separately, or both at the same time, by the two sets of keys; or both coupled and played by one set of keys, by means of couplers, Р or O, and eccentric bars, h, j, or other equivalent devices, substantially as herein described.

Second. Coupling either or both the organ and piano with a pedal action, R, n, Q, and uncoupling them from it by means of couplers, T, U, acting on the keys and eccentric bars, t, w, or their equivalents, so that either the organ. and piano forte, or both, can be played upon by the pedals, substantially as herein set forth.

RICHARD M. FERRIS.

No. 8588.-Improvement in Carriages.

What I do claim as my invention, and desire to secure by letters patent, is

First. The employment of segments, c, d, and fifth wheels, F, G, (or parts corresponding thereto,) attached as described; the one segment, d,